/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:14:27,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:14:27,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:14:27,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:14:27,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 21:14:27,444 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:14:27,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:14:27,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:14:27,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:14:27,447 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:14:27,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:14:27,447 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:14:27,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:14:27,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:14:27,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:14:27,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:14:27,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:14:27,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:14:27,450 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:14:27,450 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:14:27,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:14:27,451 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:14:27,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:14:27,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:14:27,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:14:27,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:14:27,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:14:27,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:14:27,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:14:27,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:14:27,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:14:27,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:14:27,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:14:27,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:14:27,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:14:27,709 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:14:27,725 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:14:27,729 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:14:27,730 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:14:27,731 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:14:27,732 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2019-11-23 21:14:27,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ba76d92/814c6c78ed584efb901a819492fffe02/FLAGb94f008d2 [2019-11-23 21:14:28,463 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:14:28,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2019-11-23 21:14:28,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ba76d92/814c6c78ed584efb901a819492fffe02/FLAGb94f008d2 [2019-11-23 21:14:28,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ba76d92/814c6c78ed584efb901a819492fffe02 [2019-11-23 21:14:28,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:14:28,670 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:14:28,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:14:28,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:14:28,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:14:28,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:14:28" (1/1) ... [2019-11-23 21:14:28,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1f2c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:28, skipping insertion in model container [2019-11-23 21:14:28,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:14:28" (1/1) ... [2019-11-23 21:14:28,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:14:28,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:14:29,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:14:29,751 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:14:30,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:14:30,149 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:14:30,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30 WrapperNode [2019-11-23 21:14:30,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:14:30,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:14:30,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:14:30,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:14:30,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30" (1/1) ... [2019-11-23 21:14:30,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30" (1/1) ... [2019-11-23 21:14:30,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:14:30,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:14:30,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:14:30,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:14:30,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30" (1/1) ... [2019-11-23 21:14:30,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30" (1/1) ... [2019-11-23 21:14:30,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30" (1/1) ... [2019-11-23 21:14:30,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30" (1/1) ... [2019-11-23 21:14:30,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30" (1/1) ... [2019-11-23 21:14:30,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30" (1/1) ... [2019-11-23 21:14:30,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30" (1/1) ... [2019-11-23 21:14:30,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:14:30,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:14:30,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:14:30,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:14:30,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:14:30,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:14:30,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:14:35,158 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:14:35,159 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:14:35,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:14:35 BoogieIcfgContainer [2019-11-23 21:14:35,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:14:35,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:14:35,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:14:35,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:14:35,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:14:28" (1/3) ... [2019-11-23 21:14:35,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e470cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:14:35, skipping insertion in model container [2019-11-23 21:14:35,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:30" (2/3) ... [2019-11-23 21:14:35,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e470cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:14:35, skipping insertion in model container [2019-11-23 21:14:35,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:14:35" (3/3) ... [2019-11-23 21:14:35,169 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label28.c [2019-11-23 21:14:35,179 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:14:35,189 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:14:35,201 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:14:35,251 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:14:35,251 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:14:35,252 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:14:35,252 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:14:35,252 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:14:35,253 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:14:35,253 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:14:35,253 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:14:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states. [2019-11-23 21:14:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 21:14:35,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:35,302 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:35,302 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1317301102, now seen corresponding path program 1 times [2019-11-23 21:14:35,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:35,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123611059] [2019-11-23 21:14:35,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:14:35,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123611059] [2019-11-23 21:14:35,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:35,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:14:35,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719918530] [2019-11-23 21:14:35,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:14:35,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:14:35,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:35,759 INFO L87 Difference]: Start difference. First operand 424 states. Second operand 4 states. [2019-11-23 21:14:40,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:40,025 INFO L93 Difference]: Finished difference Result 1468 states and 2718 transitions. [2019-11-23 21:14:40,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:14:40,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-23 21:14:40,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:40,073 INFO L225 Difference]: With dead ends: 1468 [2019-11-23 21:14:40,074 INFO L226 Difference]: Without dead ends: 977 [2019-11-23 21:14:40,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2019-11-23 21:14:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 973. [2019-11-23 21:14:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2019-11-23 21:14:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1487 transitions. [2019-11-23 21:14:40,196 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1487 transitions. Word has length 32 [2019-11-23 21:14:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:40,197 INFO L462 AbstractCegarLoop]: Abstraction has 973 states and 1487 transitions. [2019-11-23 21:14:40,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:14:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1487 transitions. [2019-11-23 21:14:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-23 21:14:40,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:40,205 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:40,205 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:40,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:40,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2019188173, now seen corresponding path program 1 times [2019-11-23 21:14:40,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:40,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576164607] [2019-11-23 21:14:40,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:14:40,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576164607] [2019-11-23 21:14:40,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:40,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:14:40,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868188271] [2019-11-23 21:14:40,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:14:40,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:40,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:14:40,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:40,616 INFO L87 Difference]: Start difference. First operand 973 states and 1487 transitions. Second operand 4 states. [2019-11-23 21:14:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:44,167 INFO L93 Difference]: Finished difference Result 3746 states and 5750 transitions. [2019-11-23 21:14:44,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:14:44,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2019-11-23 21:14:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:44,183 INFO L225 Difference]: With dead ends: 3746 [2019-11-23 21:14:44,184 INFO L226 Difference]: Without dead ends: 2775 [2019-11-23 21:14:44,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:44,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2019-11-23 21:14:44,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 1872. [2019-11-23 21:14:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2019-11-23 21:14:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2495 transitions. [2019-11-23 21:14:44,243 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2495 transitions. Word has length 151 [2019-11-23 21:14:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:44,246 INFO L462 AbstractCegarLoop]: Abstraction has 1872 states and 2495 transitions. [2019-11-23 21:14:44,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:14:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2495 transitions. [2019-11-23 21:14:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-11-23 21:14:44,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:44,259 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:44,259 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:44,259 INFO L82 PathProgramCache]: Analyzing trace with hash 516991842, now seen corresponding path program 1 times [2019-11-23 21:14:44,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:44,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275938410] [2019-11-23 21:14:44,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 21:14:44,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275938410] [2019-11-23 21:14:44,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736367919] [2019-11-23 21:14:44,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:14:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:44,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:14:44,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:14:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-23 21:14:45,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:14:45,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2019-11-23 21:14:45,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65688008] [2019-11-23 21:14:45,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:14:45,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:45,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:14:45,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:45,044 INFO L87 Difference]: Start difference. First operand 1872 states and 2495 transitions. Second operand 3 states. [2019-11-23 21:14:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:47,926 INFO L93 Difference]: Finished difference Result 4942 states and 6535 transitions. [2019-11-23 21:14:47,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:14:47,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2019-11-23 21:14:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:47,949 INFO L225 Difference]: With dead ends: 4942 [2019-11-23 21:14:47,949 INFO L226 Difference]: Without dead ends: 3072 [2019-11-23 21:14:47,953 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2019-11-23 21:14:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2771. [2019-11-23 21:14:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2771 states. [2019-11-23 21:14:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 3503 transitions. [2019-11-23 21:14:48,043 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 3503 transitions. Word has length 228 [2019-11-23 21:14:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:48,046 INFO L462 AbstractCegarLoop]: Abstraction has 2771 states and 3503 transitions. [2019-11-23 21:14:48,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:14:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 3503 transitions. [2019-11-23 21:14:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2019-11-23 21:14:48,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:48,053 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:48,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:14:48,258 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:48,259 INFO L82 PathProgramCache]: Analyzing trace with hash 78183249, now seen corresponding path program 1 times [2019-11-23 21:14:48,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:48,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403573242] [2019-11-23 21:14:48,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 21:14:48,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403573242] [2019-11-23 21:14:48,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:48,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:14:48,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028181505] [2019-11-23 21:14:48,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:14:48,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:48,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:14:48,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:14:48,817 INFO L87 Difference]: Start difference. First operand 2771 states and 3503 transitions. Second operand 5 states. [2019-11-23 21:14:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:53,092 INFO L93 Difference]: Finished difference Result 6439 states and 7983 transitions. [2019-11-23 21:14:53,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:14:53,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2019-11-23 21:14:53,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:53,115 INFO L225 Difference]: With dead ends: 6439 [2019-11-23 21:14:53,115 INFO L226 Difference]: Without dead ends: 3670 [2019-11-23 21:14:53,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:14:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2019-11-23 21:14:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 3370. [2019-11-23 21:14:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3370 states. [2019-11-23 21:14:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 4138 transitions. [2019-11-23 21:14:53,190 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 4138 transitions. Word has length 310 [2019-11-23 21:14:53,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:53,190 INFO L462 AbstractCegarLoop]: Abstraction has 3370 states and 4138 transitions. [2019-11-23 21:14:53,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:14:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 4138 transitions. [2019-11-23 21:14:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2019-11-23 21:14:53,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:53,196 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:53,197 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:53,197 INFO L82 PathProgramCache]: Analyzing trace with hash 579536590, now seen corresponding path program 1 times [2019-11-23 21:14:53,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:53,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101693319] [2019-11-23 21:14:53,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 21:14:53,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101693319] [2019-11-23 21:14:53,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:53,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:14:53,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302143568] [2019-11-23 21:14:53,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:14:53,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:14:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:14:53,408 INFO L87 Difference]: Start difference. First operand 3370 states and 4138 transitions. Second operand 3 states. [2019-11-23 21:14:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:57,260 INFO L93 Difference]: Finished difference Result 9132 states and 11306 transitions. [2019-11-23 21:14:57,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:14:57,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 319 [2019-11-23 21:14:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:57,286 INFO L225 Difference]: With dead ends: 9132 [2019-11-23 21:14:57,287 INFO L226 Difference]: Without dead ends: 5764 [2019-11-23 21:14:57,293 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:14:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5764 states. [2019-11-23 21:14:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5764 to 3968. [2019-11-23 21:14:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3968 states. [2019-11-23 21:14:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 4936 transitions. [2019-11-23 21:14:57,375 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 4936 transitions. Word has length 319 [2019-11-23 21:14:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:57,376 INFO L462 AbstractCegarLoop]: Abstraction has 3968 states and 4936 transitions. [2019-11-23 21:14:57,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:14:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 4936 transitions. [2019-11-23 21:14:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2019-11-23 21:14:57,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:57,384 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:57,385 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1647724765, now seen corresponding path program 1 times [2019-11-23 21:14:57,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:57,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962432250] [2019-11-23 21:14:57,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:14:57,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962432250] [2019-11-23 21:14:57,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:57,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:14:57,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39510139] [2019-11-23 21:14:57,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:14:57,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:57,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:14:57,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:57,857 INFO L87 Difference]: Start difference. First operand 3968 states and 4936 transitions. Second operand 4 states. [2019-11-23 21:15:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:01,609 INFO L93 Difference]: Finished difference Result 9734 states and 12346 transitions. [2019-11-23 21:15:01,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:15:01,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 384 [2019-11-23 21:15:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:01,629 INFO L225 Difference]: With dead ends: 9734 [2019-11-23 21:15:01,629 INFO L226 Difference]: Without dead ends: 5768 [2019-11-23 21:15:01,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5768 states. [2019-11-23 21:15:01,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5768 to 5765. [2019-11-23 21:15:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5765 states. [2019-11-23 21:15:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 7047 transitions. [2019-11-23 21:15:01,719 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 7047 transitions. Word has length 384 [2019-11-23 21:15:01,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:01,720 INFO L462 AbstractCegarLoop]: Abstraction has 5765 states and 7047 transitions. [2019-11-23 21:15:01,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:15:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 7047 transitions. [2019-11-23 21:15:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2019-11-23 21:15:01,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:01,728 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:01,728 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:01,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash 624859565, now seen corresponding path program 1 times [2019-11-23 21:15:01,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:01,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495607291] [2019-11-23 21:15:01,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:15:02,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495607291] [2019-11-23 21:15:02,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452235426] [2019-11-23 21:15:02,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:02,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:15:02,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:02,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:15:02,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:02,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:02,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:02,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:02,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:02,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:02,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:02,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:02,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:02,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 135 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:15:03,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:15:03,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2019-11-23 21:15:03,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367341221] [2019-11-23 21:15:03,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 21:15:03,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:03,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 21:15:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:15:03,165 INFO L87 Difference]: Start difference. First operand 5765 states and 7047 transitions. Second operand 8 states. [2019-11-23 21:15:32,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:32,274 INFO L93 Difference]: Finished difference Result 33461 states and 41946 transitions. [2019-11-23 21:15:32,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 21:15:32,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 409 [2019-11-23 21:15:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:32,361 INFO L225 Difference]: With dead ends: 33461 [2019-11-23 21:15:32,362 INFO L226 Difference]: Without dead ends: 27698 [2019-11-23 21:15:32,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2019-11-23 21:15:32,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27698 states. [2019-11-23 21:15:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27698 to 20760. [2019-11-23 21:15:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20760 states. [2019-11-23 21:15:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20760 states to 20760 states and 25499 transitions. [2019-11-23 21:15:32,747 INFO L78 Accepts]: Start accepts. Automaton has 20760 states and 25499 transitions. Word has length 409 [2019-11-23 21:15:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:32,748 INFO L462 AbstractCegarLoop]: Abstraction has 20760 states and 25499 transitions. [2019-11-23 21:15:32,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 21:15:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 20760 states and 25499 transitions. [2019-11-23 21:15:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2019-11-23 21:15:32,766 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:32,766 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:32,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:32,971 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:32,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:32,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1671806954, now seen corresponding path program 1 times [2019-11-23 21:15:32,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:32,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292804503] [2019-11-23 21:15:32,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 504 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 21:15:34,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292804503] [2019-11-23 21:15:34,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345980382] [2019-11-23 21:15:34,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:34,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:15:34,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2019-11-23 21:15:34,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:15:34,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2019-11-23 21:15:34,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216768910] [2019-11-23 21:15:34,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:15:34,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:34,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:15:34,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:15:34,758 INFO L87 Difference]: Start difference. First operand 20760 states and 25499 transitions. Second operand 3 states. [2019-11-23 21:15:37,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:37,320 INFO L93 Difference]: Finished difference Result 43610 states and 53948 transitions. [2019-11-23 21:15:37,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:15:37,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 514 [2019-11-23 21:15:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:37,359 INFO L225 Difference]: With dead ends: 43610 [2019-11-23 21:15:37,360 INFO L226 Difference]: Without dead ends: 22852 [2019-11-23 21:15:37,380 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 513 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:15:37,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22852 states. [2019-11-23 21:15:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22852 to 21349. [2019-11-23 21:15:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21349 states. [2019-11-23 21:15:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21349 states to 21349 states and 25566 transitions. [2019-11-23 21:15:37,697 INFO L78 Accepts]: Start accepts. Automaton has 21349 states and 25566 transitions. Word has length 514 [2019-11-23 21:15:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:37,699 INFO L462 AbstractCegarLoop]: Abstraction has 21349 states and 25566 transitions. [2019-11-23 21:15:37,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:15:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 21349 states and 25566 transitions. [2019-11-23 21:15:37,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2019-11-23 21:15:37,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:37,717 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:37,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:37,930 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:37,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:37,931 INFO L82 PathProgramCache]: Analyzing trace with hash -402088235, now seen corresponding path program 1 times [2019-11-23 21:15:37,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:37,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539559587] [2019-11-23 21:15:37,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 539 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 21:15:38,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539559587] [2019-11-23 21:15:38,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397964855] [2019-11-23 21:15:38,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:39,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:15:39,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 558 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 21:15:39,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:15:39,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2019-11-23 21:15:39,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670825254] [2019-11-23 21:15:39,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:15:39,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:39,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:15:39,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:15:39,415 INFO L87 Difference]: Start difference. First operand 21349 states and 25566 transitions. Second operand 3 states. [2019-11-23 21:15:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:41,598 INFO L93 Difference]: Finished difference Result 42696 states and 51130 transitions. [2019-11-23 21:15:41,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:15:41,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 547 [2019-11-23 21:15:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:41,624 INFO L225 Difference]: With dead ends: 42696 [2019-11-23 21:15:41,624 INFO L226 Difference]: Without dead ends: 21349 [2019-11-23 21:15:41,643 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 546 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:15:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21349 states. [2019-11-23 21:15:41,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21349 to 21349. [2019-11-23 21:15:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21349 states. [2019-11-23 21:15:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21349 states to 21349 states and 25218 transitions. [2019-11-23 21:15:41,923 INFO L78 Accepts]: Start accepts. Automaton has 21349 states and 25218 transitions. Word has length 547 [2019-11-23 21:15:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:41,924 INFO L462 AbstractCegarLoop]: Abstraction has 21349 states and 25218 transitions. [2019-11-23 21:15:41,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:15:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 21349 states and 25218 transitions. [2019-11-23 21:15:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2019-11-23 21:15:41,935 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:41,936 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:42,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:42,148 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:42,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:42,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1478183197, now seen corresponding path program 1 times [2019-11-23 21:15:42,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:42,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331100962] [2019-11-23 21:15:42,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 635 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 21:15:42,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331100962] [2019-11-23 21:15:42,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:15:42,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:15:42,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490273540] [2019-11-23 21:15:42,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:15:42,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:42,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:15:42,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:42,686 INFO L87 Difference]: Start difference. First operand 21349 states and 25218 transitions. Second operand 4 states. [2019-11-23 21:15:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:46,689 INFO L93 Difference]: Finished difference Result 42403 states and 50118 transitions. [2019-11-23 21:15:46,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:15:46,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 567 [2019-11-23 21:15:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:46,713 INFO L225 Difference]: With dead ends: 42403 [2019-11-23 21:15:46,713 INFO L226 Difference]: Without dead ends: 21056 [2019-11-23 21:15:46,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21056 states. [2019-11-23 21:15:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21056 to 21047. [2019-11-23 21:15:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21047 states. [2019-11-23 21:15:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21047 states to 21047 states and 23923 transitions. [2019-11-23 21:15:46,918 INFO L78 Accepts]: Start accepts. Automaton has 21047 states and 23923 transitions. Word has length 567 [2019-11-23 21:15:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:46,919 INFO L462 AbstractCegarLoop]: Abstraction has 21047 states and 23923 transitions. [2019-11-23 21:15:46,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:15:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 21047 states and 23923 transitions. [2019-11-23 21:15:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2019-11-23 21:15:46,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:46,928 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:46,928 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1082476183, now seen corresponding path program 1 times [2019-11-23 21:15:46,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:46,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660646025] [2019-11-23 21:15:46,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 317 proven. 30 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-23 21:15:47,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660646025] [2019-11-23 21:15:47,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269660741] [2019-11-23 21:15:47,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:47,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:15:47,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:47,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:47,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:15:47,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:47,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:15:47,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:15:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 317 proven. 30 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-23 21:15:48,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:15:48,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 21:15:48,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818907528] [2019-11-23 21:15:48,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 21:15:48,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:48,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 21:15:48,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:15:48,183 INFO L87 Difference]: Start difference. First operand 21047 states and 23923 transitions. Second operand 8 states.